Jasmine Birtles
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What is The Cheapest Trading Platform in the UK?
Ruby Layram
18th May 2026
If you’re starting to invest in 2026, one of the smartest things you can do is keep your investing costs low.
Why?
Because fees quietly eat into your returns over time. And if you’re investing for decades, even small differences in platform charges can end up costing you thousands of pounds.
The good news? There are now several genuinely low-cost investment platforms available to UK investors.
But “cheap” can mean different things depending on:
- How much you invest
- Whether you buy shares or funds
- Whether you invest monthly
- Whether you use an ISA or SIPP
- How often you trade
So, here’s a beginner-friendly breakdown of the cheapest trading platforms in the UK in May 2026, and why each one stands out.
1. Trading 212: Cheapest Overall for Most Beginners
For most beginner investors, Trading 212 is probably the cheapest overall investing platform in the UK right now.
Why it’s so cheap:
- £0 commission investing
- No platform fee on ISAs
- Fractional shares available
- Free recurring investments
- No custody fees for standard investing
This makes it incredibly attractive for:
- New investors
- Monthly investing
- Small portfolios
- ETF investing
One of the biggest advantages is that you can invest little amounts regularly without getting hammered by dealing fees.
For example: Investing £100 per month into an ETF costs virtually nothing in platform charges.
That’s difficult to beat.
Best for:
Beginner investors and long-term ETF investors.
2. InvestEngine: Cheapest ETF Investing Platform
If your main goal is investing in ETFs, InvestEngine is one of the cheapest platforms in the UK.
Why investors like it:
- Commission-free ETF investing
- No ISA fees
- Low-cost portfolios
- Easy automated investing
The catch?
You can only invest in ETFs.
So if you want:
- Individual stocks
- Investment trusts
- Bonds
…this platform may feel restrictive.
But for simple long-term investing into:
- S&P 500 ETFs
- Global index funds
- Dividend ETFs
…it’s extremely cost-effective.
Best for:
Passive investors focused on ETFs.
3. Freetrade: Cheap and Very Beginner-Friendly
Freetrade helped popularise commission-free investing in the UK.
It remains one of the cheapest and easiest platforms for beginners.
Why it’s cheap:
- Free basic investing account
- Commission-free trades
- User-friendly app
- Fractional shares
Freetrade is especially popular among younger investors because:
- The app feels modern and simple
- Investing feels accessible
- You can start with small amounts
However: Some premium features require paid plans.
So costs can rise depending on:
- ISA usage
- SIPPs
- Advanced account features
Best for:
Mobile-first beginner investors.
4. XTB: Cheapest for Active Investors
XTB has become increasingly popular among UK investors in 2026.
Why it’s cheap:
- Commission-free stock and ETF investing (up to monthly limits)
- No account opening fees
- Strong investing tools
- Competitive FX pricing
It’s a slightly more advanced platform compared to Trading 212 or Freetrade.
But many investors like:
- The research tools
- Market analysis
- Broader investment access
It also appeals to investors who may eventually want more advanced functionality later.
Best for:
Investors who want low costs with more advanced tools.
5. Interactive Investor: Cheapest for Larger Portfolios
Interactive Investor works differently from most platforms.
Instead of charging percentage-based fees, it uses: A flat monthly subscription model.
Why this matters:
Percentage fees become expensive as your portfolio grows.
For example:
- A 0.45% platform fee on £100,000 = £450 annually
- Flat-fee platforms can become much cheaper at scale
That’s why Interactive Investor is often considered one of the cheapest options for:
- Larger ISA portfolios
- SIPPs
- Experienced investors
It’s particularly attractive for long-term investors building significant wealth over decades.
Best for:
Large portfolios and long-term investors.
Cheapest Platforms by Investor Type
| Investor Type | Cheapest Platform |
|---|---|
| Complete beginners | Trading 212 |
| ETF investors | InvestEngine |
| Mobile app investors | Freetrade |
| Active investors | XTB |
| Large portfolios | Interactive Investor |
What Fees Should Investors Watch Out For?
Even “cheap” platforms can still charge hidden costs.
Here are the main fees to check:
Platform fees
Annual charges for holding investments.
Dealing fees
Charges every time you buy or sell.
FX fees
Currency conversion fees on US stocks.
ISA or SIPP fees
Some providers charge extra for tax wrappers.
Withdrawal fees
Less common, but still worth checking.
Is the Cheapest Platform Always the Best?
Not necessarily.
A slightly more expensive platform may still be worth it if it offers:
- Better research tools
- Stronger customer support
- More investment choices
- Better usability
For beginners especially, ease of use often matters more than saving a few pounds.
Because the best platform is ultimately the one you’ll actually stick with long term.
Final Thoughts
The rise of commission-free investing has made building wealth more accessible than ever in 2026.
For most beginner investors:
- Trading 212
- InvestEngine
- Freetrade
are among the cheapest and easiest places to start.
Meanwhile:
- XTB appeals to more active investors
- Interactive Investor becomes highly competitive for larger portfolios
The most important thing? Starting consistently and keeping fees reasonably low over time.
This article is for informational purposes only and does not constitute financial advice. Investments can fall as well as rise in value, and you may get back less than you invest. Always do your own research before
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